Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from £88

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
2 Sep — 9 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl are usually found in January or February, booked 62 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Sky Harbor Intl to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Sky Harbor Intl to Seattle
Explore the most affordable flight options available from Sky Harbor Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 August 2026.

Mon 31/806:02
PHX
-
SEA
Nonstop3h 03m
Alaska Airlines
Tue 8/907:40
SEA
-
PHX
1 stop11h 27m
Alaska Airlines
Deal found 31/7£163
Tue 18/815:35
PHX
-
SEA
1 stop4h 40m
Southwest
Mon 24/820:20
SEA
-
PHX
Nonstop2h 55m
Southwest
Deal found 29/7£165
Tue 8/908:20
PHX
-
SEA
Nonstop3h 07m
Alaska Airlines
Tue 15/908:41
SEA
-
PHX
1 stop5h 52m
Alaska Airlines
Deal found 29/7£167
Fri 28/806:02
PHX
-
SEA
Nonstop3h 03m
Alaska Airlines
Fri 4/919:00
SEA
-
PHX
Nonstop3h 00m
Alaska Airlines
Deal found 30/7£168
Tue 1/915:35
PHX
-
SEA
1 stop4h 40m
Southwest
Wed 2/909:25
SEA
-
PHX
2 stops8h 50m
Southwest
Deal found 29/7£169
Sat 19/909:22
PHX
-
SEA
Nonstop3h 12m
Alaska Airlines
Wed 30/907:40
SEA
-
PHX
1 stop6h 53m
Alaska Airlines
Deal found 31/7£171
Tue 18/818:15
PHX
-
SEA
Nonstop3h 00m
Southwest
Thu 20/805:30
SEA
-
PHX
2 stops7h 20m
Southwest
Deal found 30/7£172
Fri 11/912:13
PHX
-
SEA
1 stop6h 39m
Alaska Airlines
Mon 14/920:49
SEA
-
PHX
1 stop14h 42m
Alaska Airlines
Deal found 1/8£173
Tue 1/908:02
PHX
-
SEA
Nonstop3h 07m
Alaska Airlines
Wed 2/910:18
SEA
-
PHX
1 stop8h 49m
Alaska Airlines
Deal found 30/7£174
Sun 16/810:26
PHX
-
SEA
1 stop5h 02m
United Airlines
Wed 26/813:16
SEA
-
PHX
1 stop5h 19m
United Airlines
Deal found 30/7£176
Tue 18/815:35
PHX
-
SEA
1 stop4h 40m
Southwest
Fri 28/815:25
SEA
-
PHX
2 stops6h 30m
Southwest
Deal found 30/7£176

Find flight deals from Sky Harbor Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 August 2026.

Round-trip from

£161

One-way from

£88

Popular in

July

Cheapest in

January

Average price

£183
Delta
  • Delta
  • 23/8-30/8
  • Nonstop
  • 6h 14m total
  • Phoenix to Seattle
Search Deals
Delta
  • Delta
  • 17/8
  • Nonstop
  • 3h 11m total
  • Phoenix to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£29 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sky Harbor Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 August 2026.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 13/10

08:00-11:20

Nonstop3h 20m

Seattle/Tacoma Intl

Fri 16/10

20:15-23:18

Nonstop3h 03m

£165

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 8/9

19:49-10:25

1 stop14h 36m

Seattle/Tacoma Intl

Mon 21/9

20:49-11:31

1 stop14h 42m

£165

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 7/9

20:51-23:59

Nonstop3h 08m

Seattle/Tacoma Intl

Wed 9/9

11:55-15:10

Nonstop3h 15m

£172
Fastest return journey

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 4/9

06:59-10:05

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 8/9

20:39-23:36

Nonstop2h 57m

£172

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sun 16/8

10:26-15:28

1 stop5h 02m

Seattle/Tacoma Intl

Wed 26/8

13:16-18:35

1 stop5h 19m

£176

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 17/8

12:12-15:23

Nonstop3h 11m

Seattle/Tacoma Intl

Thu 20/8

11:50-15:04

Nonstop3h 14m

£176

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 18/8

15:35-20:15

1 stop4h 40m

Seattle/Tacoma Intl

Fri 28/8

15:25-21:55

2 stops6h 30m

£176

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 10/9

18:38-21:46

Nonstop3h 08m

Seattle/Tacoma Intl

Tue 15/9

11:32-19:07

1 stop7h 35m

£178

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 13/11

16:55-19:09

Nonstop3h 14m

Seattle/Tacoma Intl

Wed 18/11

09:00-20:09

1 stop10h 09m

£178

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 3/10

10:12-20:26

1 stop10h 14m

Seattle/Tacoma Intl

Sun 11/10

07:27-10:32

Nonstop3h 05m

£178

Flights are sorted by cheapest return flights first.

Deals found on 2/8

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Sky Harbor Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sky Harbor Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Phoenix Sky Harbor Intl Airport to Seattle

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

The price you pay for your flight from Phoenix Sky Harbor Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £95). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHX to SEA?

Find hourly flight availability from Sky Harbor Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 August 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 73% on flights from Phoenix Sky Harbor Intl Airport to Seattle by exploring options for tickets in the morning.

How much does it cost for a return flight from Phoenix Sky Harbor Intl Airport to Seattle?

Airfare is typical for this route at the moment.

Phoenix Sky Harbor Intl Airport to Seattle flights typically cost between £134 and £214 in August.
The cheapest return price found within the last 5 days was £161 on Delta (23 Aug–30 Aug).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 3 August 2026.
Read through reviews of airlines operating flights from Phoenix Sky Harbor Intl Airport to Seattle, such as Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,758 reviews
Check prices

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Alaska Airlines
7.9
Good
12,758 reviews
Alaska Airlines
7.9
Good
12,758 reviews
Check prices

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.0

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Phoenix Sky Harbor Intl?

    For a flight from Phoenix Sky Harbor Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 25 inbound flights from Phoenix Sky Harbor Intl per day. 1 airline has flights to Seattle/Tacoma Intl from Phoenix Sky Harbor Intl on a regular basis.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Seattle?

    Airlines like Delta, Alaska Airlines, and United Airlines fly from Phoenix Sky Harbor Intl Airport to Seattle in about 3h 20m. The time it takes to get you to your destination can typically vary by up to 11h 16m. Phoenix Sky Harbor Intl Airport and Seattle are separated by a distance of 1107 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Phoenix Sky Harbor Intl Airport to Seattle round-trip?

    According to our current data, Alaska Airlines (£149), offers the cheapest pricing from Phoenix Sky Harbor Intl Airport to Seattle. You may be able to fly from Phoenix Sky Harbor Intl Airport to Seattle for 9% less than the average price by searching for this airline.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Seattle?

    Consider KLM (97%), Air France (93%) or Korean Air (91%) when booking your flight. These represent the most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Seattle.

  • Can I find deals for flights from Sky Harbor Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Sky Harbor Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Sky Harbor Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sky Harbor Intl to Seattle.

  • Can I find deals for business class flights from Sky Harbor Intl to Seattle?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £95). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Sky Harbor Intl to Seattle

Discover the top airline that operate flights from Sky Harbor Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£149Average£239FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sky Harbor Intl to Seattle?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Sky Harbor Intl today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Sky Harbor Intl to Seattle?

Millions of users choose and trust Cheapflights to book the best flight deals from Sky Harbor Intl to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Sky Harbor Intl to Seattle with no change fees?

Yes, we can. To see specific flights from Sky Harbor Intl to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Sky Harbor Intl to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Sky Harbor Intl today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.